📚 Year 11 OCR Economics: Case Study Practical Exercises | Year 11 OCR 经济：案例分析实战演练
Case study questions in OCR GCSE Economics require you to apply economic concepts to real‑world scenarios, interpret data and construct well‑reasoned arguments. This article guides you through a series of practical exercises designed to build confidence and exam technique, covering everything from reading the case to writing a high‑mark evaluation.
OCR GCSE 经济课程的案例分析题要求你将经济学概念应用到真实情境中、分析数据并构建有说服力的论证。本文通过一系列实战演练引导你建立信心和考试技巧，涵盖从阅读案例到撰写高分评价的每一个环节。
1. Understanding the Case Study Question | 理解案例分析题
A typical OCR case study question asks you to 'discuss', 'evaluate' or 'analyse' an economic issue. The command word tells you what the examiner expects: 'analyse' means break down the causes and effects; 'evaluate' requires weighing up both sides and making a judgement.
典型的OCR案例分析题会要求你“讨论”、“评价”或“分析”某个经济问题。指令词告诉你考官期待什么：“分析”意味着拆解原因与影响；“评价”则要求权衡正反两面并做出判断。
Always underline the command word and any specific economic concepts mentioned, such as 'demand', 'supply', 'market failure' or 'government intervention'. Knowing exactly what is being asked prevents you from drifting off‑topic.
务必在题目中划出指令词以及提到的具体经济概念，比如“需求”、“供给”、“市场失灵”或“政府干预”。准确把握提问内容可以防止你偏题。
2. How to Read and Annotate Effectively | 高效阅读与标注
Read the case text twice: first for a general understanding, second to highlight economic data, stakeholders and causes and effects. Use abbreviations in the margin, such as 'D↑' for an increase in demand or 'S↓' for a decrease in supply, to create a quick reference map.
案例文本要读两遍：第一遍获取整体理解，第二遍划出经济数据、利益相关者以及原因和影响。在页边使用缩写，如用“D↑”表示需求上升、“S↓”表示供给下降，制作快速参考图。
Circle figures like prices, quantities, percentages and dates – these will be essential for accurate analysis. If the case mentions a government tax or subsidy, jot down which market is affected and how the intervention works.
圈出价格、数量、百分比和日期等数字——这些是准确分析的基础。如果案例提到政府税收或补贴，立刻记下影响的是哪个市场以及干预的机制。
3. Identifying Key Economic Concepts | 识别关键经济概念
Every case study is built around core GCSE concepts. Look for signals of scarcity (limited resources), opportunity cost (the next best alternative forgone), demand and supply shifts, or market failures such as negative externalities (e.g. pollution).
每一个案例研究都以GCSE核心概念为基础。寻找稀缺性（资源有限）、机会成本（放弃的次优选择）、需求与供给变动，或者市场失灵，比如负外部性（如污染）等信号。
For example, a case about rising food prices might involve a supply shock (bad weather) and income elasticity of demand. A case about a new housing development could link to positive externalities (more green space) and government opportunity cost.
例如，关于食品价格上涨的案例可能涉及供给冲击（恶劣天气）和需求的收入弹性。关于新住房开发的案例可以联系正外部性（更多绿地）和政府的机会成本。
4. Analysing Data and Graphs | 分析数据与图表
OCR often includes a table or a graph. Begin by describing the trend: is the data rising, falling or fluctuating? Use precise numbers – 'the price of coffee rose from $2.50 to $3.80' – not vague phrases like 'it went up a lot'.
OCR常会提供表格或图表。先描述趋势：数据是上升、下降还是波动？要使用精确数字——“咖啡价格从2.50美元上涨到3.80美元”——而不是“涨了很多”这样模糊的表述。
Then explain what might have caused the trend using economic theory. If you see a change in equilibrium price, refer to a shift in demand or supply. Link data to the case: 'The 20% fall in supply due to frost explains the higher price.'
然后运用经济理论解释可能的原因。如果看到均衡价格变化，归因于需求或供给的移动。把数据与案例联系起来：“霜冻导致供给下降20%，这就解释了价格为什么更高。”
| Year | Price per kg (USD) | Qty supplied (million tonnes) |
|---|---|---|
| 2021 | 2.50 | 8.0 |
| 2022 | 3.80 | 6.4 |
5. Applying Demand and Supply Analysis | 运用需求与供给分析
Draw a simple demand and supply diagram in your answer booklet, labelled with the case context – e.g. 'Market for cocoa'. Shift the appropriate curve (left for a decrease, right for an increase) and show the new equilibrium price and quantity.
在答题册中画一个简单的需求与供给示意图，并根据案例背景标注——比如“可可市场”。移动正确的曲线（减少则左移，增加则右移），并标出新的均衡价格和数量。
Explain the shift step by step: 'The strike among cocoa farmers decreased supply from S1 to S2. Given unchanged demand, the equilibrium price rose from P1 to P2 and quantity fell.' Never assume the examiner will guess your reasoning.
逐步解释移动：“可可种植者的罢工使供给从S1减少到S2。在需求不变的情况下，均衡价格从P1上升到P2，数量下降。”永远不要假设考官会猜测你的推理。
6. Dealing with Elasticity | 处理弹性问题
ons changes in price or income, think about elasticity. Price elasticity of demand (PED) = % change in quantity demanded ÷ % tween 0 and -1 means inelastic demand; a value more negative than -1 means elastic demand.
如果案例提到价格或收入的变化，就要考虑弹性。需求的价格弹性(PED) = 需求量变化百分比 ÷ 价格变化百分比。数值介于0和-1之间表示缺乏弹性；比-1更负则表示富有弹性。
Use elasticity to predict revenue changes: for an elastic good, a price rise reduces total revenue; for an inelastic good, a price rise increases it. In a case about tobacco taxes, inelastic demand means tax revenue rises but consumption falls only slightly.
利用弹性预测收入变化：对于富于弹性的商品，涨价会减少总收入；对于缺乏弹性的商品，涨价会增加总收入。在关于烟草税的案例中，需求缺乏弹性意味着税收增加而消费量仅略微下降。
7. Discussing Market Failure | 讨论市场失灵
When the case describes pollution, over‑consumption of demerit goods or under‑provision of public goods, you are looking at market failure. Identify the type of externality: negative production externalities (e.g. factory waste) or negative consumption externalities (e.g. alcohol binge drinking).
当案例描述污染、劣值品过度消费或公共物品供给不足时，你面对的就是市场失灵。识别外部性的类型：负生产外部性（如工厂废物）或负消费外部性（如酗酒）。
Explain why the market fails: too much of the harmful good is produced because private costs are lower than social costs. Show this on a diagram with a marginal social cost curve above the marginal private cost curve.
解释为何市场失灵：由于私人成本低于社会成本，造成有害商品被过度生产。可以在图中画出边际社会成本曲线位于边际私人成本曲线之上来展示。
8. Evaluating Government Policies | 评价政府政策
Most case studies will ask you to assess a policy such as a tax, subsidy, regulation or information campaign. An evaluation requires ideas on both effectiveness and drawbacks. For example, a sugar tax may reduce consumption but could be regressive, hurting low‑income households more.
大多数案例分析会要求你评价某种政策，比如税收、补贴、管制或信息宣传。评价既要论述有效性也要指出缺点。例如，糖税可能减少消费，但可能是累退的，对低收入家庭伤害更大。
Use a mini paragraph structure: state the intended effect, then a counter‑argument, and finish with a short judgement. Phrases like 'In the short run… however, in the long run…' show higher‑order thinking.
采用一个小段式结构：先陈述预期效果，再提出反论，最后给出简短判断。使用“短期内……然而长期来看……”这样的表述能展示高阶思维。
9. Structuring a High‑Mark Answer | 构建高分答案结构
For a 6‑mark or 9‑mark case study question, follow this structure: definition of key terms, application from the case, diagram or data reference, analysis of effects, and an evaluative conclusion.
对于6分或9分的案例分析题，遵循以下结构：界定关键词汇、结合案例进行应用、引用图表或数据、分析影响，最后给出评价性结论。
An example skeleton: 'Market failure occurs when… In the case, negative externalities arise from factory emissions (Figure 1). This leads to over‑production because… A possible solution is a pollution tax. However, this could raise costs and reduce employment. Therefore, a combination of regulation and tradable permits might be more effective.'
答题框架范例：“市场失灵发生在……的情况下。在本案例中，工厂排放导致负外部性（图1）。这引起过度生产，原因是……一个可能的解决方案是征收污染税。然而，这可能会提高成本并减少就业。因此，将管制与可交易许可证相结合可能更为有效。”
10. Time Management Strategies | 时间管理策略
Allocate roughly 1.5 minutes per mark to leave time for checking. For a 9‑mark question, spend about 13–14 minutes. Split this into 2 minutes planning, 9 minutes writing, and 2 minutes reviewing.
大致按照每分1.5分钟分配时间，留出检查余地。一道9分题大约花13–14分钟。把这时间分为2分钟构思、9分钟书写和2分钟回顾。
Do not spend too long on the 2‑mark definitions at the expense of the high‑mark evaluation. A brief, accurate definition can earn full marks quickly, freeing time for deeper analysis.
不要在2分的定义题上花太多时间而牺牲高分评价题。简短准确的定义能快速拿到满分，从而为深入分析腾出时间。
11. Common Pitfalls and How to Avoid Them | 常见陷阱及避免方法
Pitfall 1: retelling the case without adding economic analysis. Remedy: after every factual sentence, add a 'because' statement using economic reasoning – 'Supply fell because of higher input costs, shifting the curve left.'
陷阱1：复述案例而不加入经济分析。补救方法：每句事实陈述后，加一个用经济推理的“因为”陈述——“由于投入成本上升，供给减少，曲线左移。”
Pitfall 2: ignoring evaluation counter‑points. Even if the question seems to support one view, always mention an alternative or a limitation. A quick 'However…' can lift your mark band.
陷阱2：忽略评价中的反面论点。即使问题看似支持一种观点，也要提到替代方案或局限性。一个快速的“然而……”可以提升你的分数段位。
12. Practice Case Study with Model Answer | 案例实战与参考答案
Case: The Housing Market in Greenwood. The local council is concerned about rising rents and homelessness. It proposes a maximum rent control of £600 per month, below the current market equilibrium rent of £750. The table shows the estimated impact.
案例：格林伍德的住房市场。当地议会对不断上涨的租金和无家可归现象感到担忧。它提议将月租金上限设为600英镑，低于当前市场均衡租金750英镑。表格显示了预计影响。
| Equilibrium | After Rent Control | |
|---|---|---|
| Rent | £750 | £600 |
| Qty demanded | 5 000 | 5 800 |
| Qty supplied | 5 000 | 4 200 |
Question (9 marks): Evaluate whether the rent control policy will improve housing affordability for low‑income families in Greenwood. Use economic analysis and the data provided.
问题（9分）：评价租金管制政策是否会提高格林伍德低收入家庭的住房可负担性。请结合经济分析和所提供的数据作答。
Model answer outline: Define rent control as a maximum price set below equilibrium. From the table, it creates a shortage of 1 600 units (5 800 - 4 200). This may leave some low‑income families unable to find housing, worsening the problem. However, for families who secure a rent‑controlled apartment, affordability improves as rent falls by £150. Over time, landlords may reduce maintenance or exit the market, reducing supply further. The policy also creates a deadweight loss. To evaluate, the short‑run benefit of lower rents must be weighed against long‑run shortages and quality decline. A better alternative could be housing subsidies targeted at low‑income households, which preserve market incentives while boosting affordability. Therefore, rent control alone is not sufficient and may need complementary measures.
参考答案要点：界定租金管制是一种低于均衡的最高限价。从表格可知，它造成了1 600个单位的短缺 (5 800 − 4 200)。这可能使部分低收入家庭找不到住房，反而恶化问题。但对获得租金管制公寓的家庭而言，租金下降150英镑确实改善了可负担性。长期来看，房东可能减少维修或退出市场，进一步缩减供给，该政策还会造成无谓损失。评价时，必须权衡短期租金下降的好处与长期短缺和质量下降的代价。一个更优的替代方案是定向提供给低收入家庭的住房补贴，既能保留市场激励又能提升可负担性。因此，仅靠租金管制并不足够，可能需要配套措施。
Published by TutorHao | Economics Revision Series | aleveler.com
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